Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study on Synthesis and Characteristics of the Optimum Urea Type Greaes for Rolling Bearings

구름베어링용 우레아계 최적 그리이스의 합성과 특성평가

  • 한종대 (창원대학교 화공시스템공학과) ;
  • 김상근 (FAG 베어링 코리아) ;
  • 김병관 (창원대학교 화공시스템공학과)
  • Published : 2006.10.31
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Abstract

Rolling bearings are classified one of the most important machine elements. The various function of bearings are greatly influenced by grease, and higher performance of rolling bearing greases is required to improve bearing lubrication. Three urea/ether oil greases with different composition were synthesized to compare the performance of these greases. The typical grease physical properties were investigated, and life test of these greases was conducted by FE-9 grease life tester. The grease with higher content of the thickener showed higher performance. After these preliminary test, twelve greases were synthesized and evaluated the performance of dropping point and OIT value. And optimized conditions for grease synthesis were selected by SSRED (Six Sigma Robust Engineering Design) using dropping point and OIT value respectively. The optimized grease using OIT value showed longer grease life than that using dropping point. Two greases were synthesized following the optimum synthesis conditions by means of OIT value. Then grease life and other properties of these greases were investigated. These two greasaes showed longer grease life than typical urea/ether oil grease.

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References

  1. Kawamura, T., Minami, M. and Hirata, M., 'Grease Life Prediction for Sealed Ball Bearings,' Trib. Trans., Vol. 44, No. 2, pp. 256-262, 2001 https://doi.org/10.1080/10402000108982456
  2. Naka, M. 'Research and Development of Lubrication Grease by NSK,' Motion & Control, No. 3, pp. 1-8, 1997
  3. Adach, K., 'Development of Low Noise Long life Lithium Complex Grease,' KOYO Engineering Journal, No. 153E, pp. 50-54, 1998
  4. Cann, P. M., Doner, J. P., Webster, M. N. and Wikstrom, V., 'Grease Degradation in Rolling Element Bearings,' Trib. Trans., Vol. 44, No. 3, pp. 399-404, 2001 https://doi.org/10.1080/10402000108982473
  5. Couronne, I., Vergne, P. and Mazuyer, D., 'Effect of Grease Composition and Structure on Film Thickness in Rolling Contact,' Trib . Trans., Vol. 46, No. 1, pp. 31-32, 2003 https://doi.org/10.1080/10402000308982596
  6. Nishimura, M., 'Technology Forecast or the 21st Century,' KOYO Engineering Journal, No. 156E, pp. 4-6, 2000
  7. Rhee, I. S., 'Development of a New Oxidtion Stbility Test Method for Grease Using a Pressure Differential Scanning Calorimeter,' NLGI's 57th Annual Meeting, TA-052, pp. 2-11, 1990
  8. Keller, M. A. and Sara, C. S., 'Behavior of High Temperature Lubricants in a Pressure Differential Scanning Calorimeter,' Tran. Trans., Vol. 41, No. 4, pp. 586-592, 1998
  9. Kim, S. K., Park, C. N. and Han, J. D., 'A Study on Characteristics of the Optimum Urea Type Grease for Rolling Bearings,' Journal of the KSTLE, Vol. 21, No. 1, pp. 21-26, 2005
  10. Kim, S. K., Park, C. N., Kim, B. K. and Han, J. D., 'Study on Oxidation Stability and Life of Rolling Bearing Grease,' J. Korean Ind. Eng. Chem., Vol. 15, No. 8, pp. 907-912, 2004

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